It wants you to read the terms and their respective explanation and then read the material given to you to find the approriate infromation. Topic is usually stated within the first couple of sentences. Text structure is like chronlogical order. Main idea is the overall idea of the text usually stated in first paragraph. Domain-specific vocab is terminology specific to a subject. Like scientific names for things. Supporting evidence is topics that support your main topic. Text features are pretty self-explanatory.
The sentence that uses commas correctly is B) Rice, beans, and tortillas are foods commonly eaten in Mexico, Guatemala, and Costa Rica. You have to add a comma in front of <em>and.</em>
